Determinants — Study Plan
MHT-CET · Mathematics
Step-by-step Determinants study plan for MHT-CET Mathematics 2026 — structured month-wise approach to mastering this chapter.
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Study Plan for Determinants
Day 1–2: Learn the Theory
Study the chapter thoroughly. Note down definitions, formulas, and key concepts.
Day 3: Practice Problems
Solve practice questions and previous year MHT-CET problems. There are 362 questions available for this chapter.
Day 4: Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding.
What to Focus On
- Determinants are defined only for square matrices
- Denoted by |A| or det(A) for matrix A
- For 1×1 matrix [a], determinant equals a
- Formula: |A| = a₁₁a₂₂ - a₁₂a₂₁
- Main diagonal minus off-diagonal products
- Sign is crucial - subtract the second product
- Expand along any row or column (first row is standard)
- Each element multiplied by its cofactor (signed minor)
- Sign pattern alternates: + - + - + ...
Common Mistakes to Avoid
When expanding a 3×3 determinant, students can use any row or column and don't need to worry about signs
Area of triangle using determinants is always (1/2) times the determinant value
If |A| = 0, then A^(-1) = 0
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